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Stop Using Multimeters, Build a Battery Swiper (instructions inside)
#11
So guys dont go haywire jumping on each other. We all have different criteria´s and ideas and thoughts.

We all know that cheap gear are cheap for a reason. Some want to use them some don't. With that said its good that new people going here do get the information of both worlds. Im also one of those wanting to have proper gear for most things but still use as Geek said the Opus. The opus is far from what my fluke does but its important to understand how it do it.

Same goes with cheap meters. If you are aware of that they are cheap and will drift and such that still might be good for you. With for instance a resolution of 0.1V and accurazy of lets say 20% you may be fine with that for checking if your cells are above 2V. I use the cheap ones too but only for very quick overlook but I dont have them for my main system.
Korishan likes this post
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#12
If your meter Is off a consistent amount Regardless of range Then it is still valuable to you as long as you know what it is off by. If you know your meter reads 20% higher than what the actual value is Thank you can open secret that no matter what value with reads Also no matter how much that cost Still calculate that into its readings
Proceed with caution. Knowledge is Power! Literally! Cool 
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#13
Ill agree with the comments about Opus, Lii-500, or similar testers… not the most accurate tools in the world, but that’s not why we buy them. We buy them to establish a baseline for cell capacity, not test ACTUAL cell capacity.  

If your testing methods are consistent across the board, you will be able to establish a baseline figure that allows you to make an informed decision as to where that cell needs to go in the battery pack.  For the most part the mAh figures generated by the tester are arbitrary values that allow you to place a cell.

It's when you start mixing your test methods… (5) Opus, (5) Lii-500, (5) Discharge PCB, (2) hobby chargers…  whatever it is, your test methods are no longer consistent and you no longer have an established baseline. That’s a FACT. Expect balance inconsistencies in your final product.

But none of the above has anything to do with confidence in readings…  a panel meter is an accessory, not a tool. I need tools to make sure my accessories work.

Same goes for a good quality hobby charger… it’s a tool that allows me to validate my dischargers.  And in the world of hobby chargers, there is a gamut of quality from excellent to junk.  I have owned the gamut, from cheap to expensive, there is a difference which is easy to appreciate.

My dad always said, there is no such thing as a free lunch, and my experience you generally get what you pay for.  As long as you understand the limitations of your methods and tools, you will often times be ahead of the game.
Ibiza likes this post
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#14
(09-14-2018, 04:04 AM)Crimp Daddy Wrote: While on the subject of suspect test leads... Don't trust what the Chinese sell on eBay, AliExpress, BangGood...

Test your test equipment... US made leads on the left, " high quality" china leads on the right.

It was enough to read voltage, but my resistance measurements felt funny, meter wasn't acting right, so I took a closer look.  

[Image: MRdgLDj.jpg?1]

Best TEST video I've ever watched ! well done lol
Geek likes this post
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